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                [Poi2001]Goldmine                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><div style="text-indent: 27pt"><span style="font-size: medium">Byteman作为Byteland的The Goldmine（某一公司厂矿）的最有功的雇员之一，即将在年末退休。为了表示对他的认真勤恳的工作的承认，The Goldmine的管理层愿意奖励他一小块长方形的矿地，此矿地长和宽为s和w且平行于坐标系统的轴线。长方形矿地的位置可由他自己选。当然，这块地的价值会随着位置的不同而不同。其价值是指这块区域内天然金矿石的数量（若矿石位于这块地的边缘，我们同样认为他是属于这个区域的）。你们的任务是计算出这块地的最大可能价值（即：为它选择最佳位置）。为简便起见，我们假定整个金矿的矿区是无穷的，但含有天然金矿石的区域却是有限的。</span></div>
<div><span style="font-size: medium"><b>要求</b></span></div>
<div style="text-indent: 21.75pt"><span style="font-size: medium">写一程序：</span></div>
<div style="margin: 0cm 0cm 0pt 61.5pt; text-indent: -18pt"><span style="font-size: medium">1、&nbsp;读入天然金矿石的位置；</span></div>
<div style="margin: 0cm 0cm 0pt 61.5pt; text-indent: -18pt"><span style="font-size: medium">2、&nbsp;计算这块地的最大可能价值（即：求给定大小的这块地所含的天然金矿石的最大数）；</span></div></p><hr/><h3>输入格式</h3><p><div><span style="font-size: medium">第一行为俩正整数s、w，<i>1&lt;=s,w&lt;=10&nbsp;000</i>，各自代表着此矩形区域平行X轴和Y轴的边的长度。第二行是一正整数n，<i>1&lt;=n&lt;=15&nbsp;000</i><i>，</i>它表示此金矿矿区</span></div>
<div><span style="font-size: medium">内天然矿石的数量。接下来的n行，每行为俩用单个空格隔开的整数x、y，<i>-30&nbsp;000&lt;=x,y&lt;=30&nbsp;000</i><i>，</i>它门分别表示了某一天然金矿石的X坐标和Y坐标。</span></div></p><hr/><h3>输出格式</h3><p><div><span style="font-size: medium">&nbsp;&nbsp;应恰有一整数，表示此块给定大小的矿地的最高价值。</span></div></p><hr/><h3>样例输入</h3><pre>1 2 
12
0 0
1 1
2 2
3 3
4 5
5 5
4 2
1 4
0 5
5 0
2 3
3 2
</pre><hr/><h3>样例输出</h3><pre>4</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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